JP2003217868A - Mirror with built-in el illumination - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mirror with built-in EL illumination convenient in portability and installation for illuminating brightly an object to observe the object easily by the mirror, by building a very thin and non-bulky illuminating EL element in the mirror, in order to eliminate requirement for preparing a new illumination, when the object is observed using the mirror in a dark place. <P>SOLUTION: In this organic or inorganic EL element of a very thin type electroluminescent element, a non-luminescent part is formed in one portion on a transparent substrate, and the element has structure of which the specular electrode portion on a backside or the specular film is seen through from the non-luminescent part, alternatively, structure of which the one portion is made transparent in a usual mirror to be bonded with the EL element on the backside. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to improve convenience by integrating a mirror and ultra-thin EL lighting in a work requiring a mirror and lighting.

[0002]

2. Description of the Related Art Conventionally, when an object to be observed with a mirror is dark and cannot be seen well, it is necessary to separately provide illumination.

[0003]

However, this has the following drawbacks. (B) It is useless to prepare new lighting. (B) It may be difficult to illuminate when an object to be observed with a mirror is present in a narrow space geometrically. (C) In most cases, the lighting consists of a hollow glass tube, which can be damaged if handled roughly. (D) Since an ordinary lighting device is large and bulky, it always requires a lot of labor to carry it, and it also takes a lot of space and labor to store or install the lighting.

[0004]

Means for Solving the Problems An organic or inorganic EL element consisting of at least a cathode, a light emitting layer and an anode is formed on a part of the back side of a transparent substrate, and the back side of the transparent substrate is covered with a mirror-like electrode or a mirror-like film. , Through the mirror-like electrode portion or the mirror-like film on the back side from the part where the light-emitting layer does not exist to be visible from the front side, or by making a part of an ordinary mirror transparent and E on the back side.
The L element was attached. The present invention is an EL built-in type mirror having the above configuration.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION An EL device utilizing electroluminescence is
Since it is self-luminous, it has high visibility, and since it is a completely solid element, it has features such as excellent impact resistance,
Attention has been paid to its use as a light emitting element in various display devices. This EL element includes an inorganic EL element that uses an inorganic compound as a light-emitting material and an organic EL element that uses an organic compound.
There is an L element. Of these, particularly the organic EL elements can reduce the applied voltage significantly, can be easily downsized, consume less power, can emit surface light, and can easily emit three primary colors. As a next-generation light-emitting device, its practical use has been actively researched. The organic EL light emitting device has a structure in which a thin film containing a fluorescent organic compound is sandwiched between a cathode and an anode, and electrons and holes are formed in the thin film.
Is an element that generates excitons (excitons) by injecting and recombining, and emits light by utilizing light emission (fluorescence / phosphorescence) when the excitons are deactivated. Here, a charge injection layer, a charge transport layer, a buffer layer, in order to relax the energy transfer barrier and efficiently send electrons / holes to the light emitting layer, or to reduce the unevenness of the substrate surface which causes a leak, A hole or electron transfer blocking layer or the like is appropriately laminated. The characteristics of this organic EL element are 1
It is possible to achieve high-luminance surface emission of about 100 to 100,000 cd / m ² at a low voltage of 0 V or less, and it is possible to emit light of blue to red or white by selecting the type of fluorescent substance. Further, the light emitting layer itself can be 1 μm or less, and the total thickness including the transparent substrate can be 2 mm or less. Here, a flexible organic EL light-emitting device can be manufactured without fear of being rolled and broken like paper (for example, Japanese Patent Laid-Open No. 2000-268954; JP 2000-
260560 Nihon Keizai Shimbun, June 22, 2001). A method for forming a film of an organic EL light emitting element uses a vacuum vapor deposition method (for example, as a method for producing a white light emitting organic EL element using the vacuum vapor deposition method, JP-A-2001-25069).
0) Similarly, as methods for producing a blue light emitting organic EL element, there are JP-A-5-17765 and JP-A-9-53068. A method using a spin coating method (for example, as a manufacturing method using a spin coating method for a blue light emitting organic EL device, JP-A-9-111233 and JP-A-10-324870).
and so on. ) And a method of applying organic EL to the original plate corresponding to the stamp by applying printing technology and bringing the original plate and the substrate into close contact (Nikkei Sangyo Shimbun, May 17, 2001, etc.)
And an inkjet method (Japanese Patent Laid-Open No. 10-153).
967 etc. ) And others include casting method, dipping method, bar coating method, roll coating method and the like. The structure of this organic EL device is based on the structure of anode / organic light emitting layer / cathode, and a hole injecting / transporting layer or electron injecting layer is appropriately provided thereon, for example, anode / hole injecting / transporting layer / organic light emitting. Layers / cathodes and anodes / hole injecting / transporting layers / organic light emitting layers / electron injecting layers / cathodes are known. When an inorganic EL element is used as a light source, the basic configuration is a light emitting element in which a hole injection electrode, an insulating layer, an inorganic EL light emitting layer, an insulating layer, and an electron injection electrode are laminated. The electrons injected from the interface between the insulating layer and the light emitting layer into the light emitting layer are accelerated in the light emitting layer by the high electric field and collide with the emission center. At this time, the emission center is excited and emits light. For example, in the case of obtaining blue light emission, the light emitting layer is ZnS to which Tm (thulium) is added. To obtain green light emission, there is ZnS to which Tb (terbium) is added. Recently, SrS: C containing copper in strontium sulfide as a blue light emitting material
The improvement of the characteristics was reported by u (Nikkan Kogyo Shimbun, TRI
GGER, March issue, 21-23p (1999)). As a specific method for producing a blue light emitting inorganic EL device, Japanese Patent Laid-Open No.
No. 00-104059, Japanese Patent Laid-Open No. 2000-104060, and the like. The total thickness of the inorganic EL element including the transparent substrate can be 2 mm or less. The inorganic EL element is inferior to the organic EL element in terms of luminous efficiency particularly in terms of blue and green light emission, but has an ability exceeding that of the organic EL element in terms of luminous lifetime and heat resistance. of course,
Depending on the progress of research in the future, the luminous efficiency may exceed that of the organic EL element. In that case, this may be used as the light source. Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. In addition, the types and combinations of the fluorescent substance, the charge injection layer, the charge transport layer, the buffer layer, the insulating layer, the electrode, etc., which are used for light emission, can achieve more efficient light emission as long as the basic configuration described in the claims is formed. You may change to what you want. Example (i): A transparent substrate such as glass or plastic is first coated on the entire surface with SiO ₂ by sputtering. Next, a transparent conductive film is formed according to the shape to be emitted. The material of the transparent electrode is tin or indium oxide. The chemical formulas are SnO ₂ (tin) and In ₂ O ₃ (indium). What is called ITO glass is In
It is an abbreviation for "Din Tin Oxide" and is a mixture of oxides of indium and tin. For organic EL elements, this IT
O is often used. First, a mask is formed according to the shape to be emitted, and the mask is covered with a transparent substrate, and a transparent conductive film is formed thereon by a sputtering method or the like. Also IT
Since O can be etched relatively easily, it may be etched by forming a film on the entire surface and then masking it with a resist or the like.
The etching solution may be an iron chloride / hydrochloric acid type or a nitric acid / sulfuric acid type. This ITO transparent conductive film functions as an anode. The transparent substrate with the ITO (In-Sn-O) transparent electrode thus prepared is subjected to ultrasonic cleaning in isopropyl alcohol for 5 minutes, and then UV ozone cleaning is performed for 30 minutes. The transparent substrate with the transparent electrode line after cleaning is mounted on the substrate holder of the vacuum vapor deposition apparatus, and the mask prepared according to the shape to emit light is covered on the substrate on the anode side. At this time, in order to prevent leakage, a mask having a size larger than that of the hole injection layer to be vapor-deposited next is used to completely cover the anode. First, N, N'-bis (N, N'-bis (N,
An N′-diphenyl-4-aminophenyl) -N, N-diphenyl-4,4′-diamino-1,1′-biphenyl film (TPD232 film) is formed. This TPD232 film functions as a hole injection layer. Next, cover with a mask created according to the shape you want to emit light. At this time, a slightly larger mask is used so that the hole transport layer to be deposited next can completely cover the hole injection layer. Then, 4,4′-bis [N- (1-naphthyl) -N having a film thickness of 20 nm was formed on the TPD232 film.
-Phenylamino] biphenyl film (NPD film) is formed. This NPD film functions as a hole transport layer. Next, cover with a mask created according to the shape you want to emit light. At this time, a slightly larger mask is used so that the hole transport layer can be completely covered with the white light emitting layer to be deposited next. Next, a 40 nm-thick styryl derivative DPVBi (FIG. 9) was formed on the NPD film.
And PAVB (FIG. 10) as a blue fluorescent dopant and a fluorescent compound (F1, fluorescence peak wavelength: 595 nm)
(FIG. 11) is vapor-deposited at a weight ratio of 40: 1: 0.05 to form a film. This film functions as a white light emitting layer. Next, cover with a mask created according to the shape you want to emit light. At this time, a mask having a slightly larger size is used so that the white light emitting layer can be completely covered with the electron transport layer to be deposited next. Next, a 20-nm-thick tris (8-quinolinol) aluminum film (Alq film) is formed on this film. This Alq film functions as an electron transport layer. Next, cover with a mask created according to the shape you want to emit light. At this time, a slightly larger mask is used so that the electron injection layer to be deposited next may completely cover the electron transport layer. After that, Li (Li: manufactured by SAES Getter Co., Ltd.) and Alq are binary-deposited to form Al as an electron injection layer.
q: A Li film is formed. After that, metal Al is vapor-deposited on the entire surface of the substrate including on the Alq: Li film to form a mirror-like metal cathode to form an organic EL element. Regarding the performance of the obtained organic EL device, when the ITO anode was used as the positive electrode and the Al cathode was used as the negative electrode and a DC voltage of 6 V was applied, the emission luminance was 319.
cd / ^{m 2,} the maximum emission luminance 100000cd / ^{m 2,} white light emission of the light-emitting efficiency 7.28cd / A is obtained. The chromaticity coordinates are also (0.33, 0.34), and white emission can be confirmed. In addition, this element has an initial luminance of 1000 cd / m
^When driven at a constant voltage at ² , the life is extremely long at 3500 hours. However, the data may be slightly different depending on the degree of cleaning of the substrate and the mixing of impurities. Here, an alloy obtained by co-evaporating magnesium and silver at a ratio of Mg: Ag = 10: 1 may be used as the cathode. A commonly used mirror is a transparent substrate on which silver is deposited. Therefore,
The electron injection layer is covered with a mask formed according to the desired shape of light emission, and at this time, a slightly larger mask is used so as to completely cover the electron injection layer with the MgAg alloy to be deposited next. After forming a film of Mg and Ag by co-evaporation, this Mg:
Silver Ag is deposited on the entire back surface of the substrate including the Ag film by vapor deposition or the like to form a mirror-like metal cathode to form an organic EL element. At this time, since silver acts as a mirror surface, the mirror surface portion is the same as an ordinary mirror in terms of performance. As a result, the mirror-like film can be seen through the transparent substrate from a portion other than the light emitting region from the front side of the substrate. A typical example of the EL illumination built-in mirror produced by the above method is (FIG. 2). Next, the substrate surface on the side where the laminated film is present is protected by an inorganic film such as a SiO ₂ film having excellent gas barrier property, a resin film, or the like, which is more difficult for water vapor to pass through, or a metal can containing a desiccant is used. Cover with UV curable adhesive or cover with glass and seal with UV curable adhesive. Thermosetting adhesives are not suitable because they may accelerate the deterioration and crystallization of the organic layer due to heat. In addition, this product is manufactured under vacuum or in a dry inert gas until it is completed. In addition, white light emission,
Other known organic fluorescent compounds, charge transport layers, charge injection layers, buffer layers, electron or hole transfer blocking layers, and the like may be used for red, blue, and green light emission. FIG. 11 shows an example of an organic fluorescent compound used for red, blue and green light emission. Example (ii): As in the case of Example (i), a mask is formed in accordance with the shape to be emitted and is covered with a transparent substrate, and an anode ITO transparent conductive film is formed thereon by a sputtering method or the like. Alternatively, after film formation on the entire surface, etching is performed according to the shape to be emitted. Next, as in the case of (i), the hole injection layer is formed on the anode in accordance with the desired shape of light emission. At this time, a film is formed using a mask having a shape such that the hole transport layer to be laminated next does not leak with the anode. After forming the hole injection layer, in the same manner as in (i), according to the shape to be emitted,
In addition, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer are stacked so that the organic layers above and below the relevant film do not leak.
The type and film thickness of each layer may be the same as in (i). Then, a metal cathode Al (aluminum) is vapor-deposited by covering it with a mask so as to contact only the transparent substrate surface on the side where the laminated film is present and the electron injection layer. Further, the cathode material may be a MgAg alloy. In that case, a AgAg alloy film is vapor-deposited with a mask so that Ag (silver) to be vapor-deposited next does not leak to the electron injection layer and does not come into contact with the thin film on the lower layer side of the electron injection layer, and Ag (silver) is deposited. The transparent substrate surface on the side with the laminated film and M
It may be vapor-deposited by covering with a mask so as to contact only the gAg alloy film. Next, the entire surface of the substrate on which the light emitting element is provided is covered with a protective layer so that each layer of the light emitting element exposed on the surface does not deteriorate or leak. It is difficult to pass water vapor and is protected by an inorganic film such as a SiO ₂ film that has a good gas barrier property, a resin film, etc., a metal can containing a desiccant is covered, and it is sealed with an ultraviolet curing adhesive or covered with glass. Seal with UV curable adhesive. Thermosetting adhesive deteriorates the organic layer due to heat,
Not suitable because it may promote crystallization. As a result, the mirror-like film can be seen through the transparent substrate from a portion other than the light emitting region from the front side of the substrate. Other details are the same as in (i). A typical example of the EL illumination built-in mirror produced by the above method is (FIG. 3). Example (iii): An anode ITO electrode is formed on a substrate in the same manner as in Example (i). After washing in the same manner as in (i), a transparent insulating film is laminated on a region that is not desired to emit light, that is, a region that is desired to be used as a mirror surface. Si as the insulating film
O _{2 and the} like are suitable. Cover with a mask of the desired shape and form a film by sputtering. Any other suitable inorganic film or resin may be used instead. Next, a mask formed according to the shape to emit light is placed on the substrate on the insulating film side. At this time, a mask is formed so that the insulating film and the transparent substrate are slightly covered so as to completely cover the anode where the hole injection layer to be vapor-deposited next is exposed. The type and film thickness of the hole injection layer are the same as in (i). After forming the hole injecting layer, the hole transporting layer, the light emitting layer, and the electron are sequentially formed in the same manner as in (i) according to the shape to be emitted and completely covering the lower organic layer so as not to leak. A transport layer and an electron injection layer are laminated. The type and thickness of each layer may be the same as in (i). Next, a metal cathode Al is formed so as to completely cover the organic layer and the insulating film.
(Aluminum) is vapor-deposited on the entire surface. The cathode material is M
It may be a gAg alloy. In that case, only the organic layer may be covered with the MgAg alloy film, and then the entire surface of the substrate may be covered with Ag (silver). As a result, the mirror-like film can be seen through the transparent substrate from a portion other than the light emitting region from the front side of the substrate. Other details are the same as in (i). E created by the above method
A typical example of the L-illumination built-in mirror is (FIG. 4). Example (iv): An anode ITO electrode is formed in the same manner as in Example (i). At this time, the mask is sputtered or the entire surface of the ITO film is etched so that the end portion of the ITO film is included in the region where light emission is desired. Next, a hole injection layer is vapor-deposited by covering with a mask prepared according to the shape to be emitted. At this time, a mask is used so that the end of the anode ITO can be completely covered with the hole injection layer. After forming the hole injection layer,
Similar to (i), a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer are sequentially laminated so as to match the shape to be emitted and completely cover the lower organic layer. The type and film thickness of each layer may be the same as in (i). Next, a transparent insulating film is formed so as to completely cover the exposed anode ITO film and not completely cover the organic layer. The type of insulating film and the stacking method may be the same as in (iii). Next, a metal cathode Al is formed thereon so as to completely cover the organic layer and the insulating film.
(Aluminum) is vapor-deposited on the entire surface. The cathode material is M
It may be a gAg alloy. In that case, only the organic layer may be covered with the MgAg alloy film, and the entire surface of the substrate may be further covered with Ag (silver). As a result, the mirror-like film can be seen through the transparent substrate from a portion other than the light emitting region from the front side of the substrate. Other details are the same as in (i). E created by the above method
A typical example of the L-illumination built-in mirror is (FIG. 5). Example (v): An anode ITO electrode is formed in the same manner as in Example (i). At this time, the mask is sputtered so that the ITO film is formed only in the region where light emission is desired, or the entire surface of the ITO film is etched and then etched. Next, a hole injection layer is vapor-deposited on the anode ITO film by covering with a mask formed according to the shape to be emitted. After forming the hole injecting layer, a hole transporting layer, a light emitting layer, an electron transporting layer, an electron injecting layer, and a cathode are sequentially laminated in the same manner as in (i) according to the desired shape of light emission. The type and film thickness of each layer may be the same as in (i). The points to note when stacking up to this point are that the film to be formed from above should be sequentially stacked so that it completely covers the film below, or that it should be stacked in a shape that is slightly smaller than the film below. hand,
The films above and below a thin film must be prevented from leaking. Next, an inorganic film such as SiO ₂ or an insulating film such as resin is formed so as to completely cover the anode, the organic layer, and the cathode only in the light emitting element portion. At this time, the insulating film is preferably transparent. Next, metal such as Ag (silver) that forms a mirror-like film including the insulating film is vapor-deposited on the entire surface of the substrate on which the light-emitting element is formed, or a mirror-like coating (coating with silver nitrate etc. Wash). As a result, the mirror-like film can be seen through the transparent substrate from a portion other than the light emitting region from the front side of the substrate. Other details are the same as in (i). A typical example of the EL illumination built-in mirror produced by the above method is (FIG. 6). Example (vi): In Example (v), when a transparent insulating film was laminated, the entire surface of the substrate was not covered with an insulating film only around the light emitting element composed of a cathode, an organic layer including a light emitting layer, and an anode. It may be covered with a transparent insulating film. The other details are the same as in Example (v). A typical example of the EL illumination built-in mirror produced by the above method is (FIG. 7). Example (vii): A transparent portion having no mirror surface film such as silver is formed on a part of the back side of the mirror. In the transparent part on the back side,
The EL element already completed is pasted. At this time,
The light emitting surface of the EL element faces the front side of the mirror and is attached to the transparent portion on the back side. The type and structure of the anode, the light emitting layer, the charge injection layer, the charge transport layer, the cathode, etc. used in the light emitting element itself may be the same as those in (i), and especially the operation such that the mirror surface film can be seen from the back side of the light emitting element itself. , No work required. A typical example of an EL illumination built-in mirror created by the above method (Fig. 8)
Is. Example (viii): Similar to (i), the entire surface of the glass substrate is first coated with SiO ₂ by sputtering. Next, an ITO transparent conductive film is formed and washed according to the shape to be emitted. Next, in order to match the shape to be emitted, and to prevent leakage, aluminum / titanium oxide, which is an insulating layer, is applied in an amount of about 260 n so as to completely cover the anode.
It is formed by atomic layer epitaxy (ALE) with a thickness of m. Next, using a mask, a light emitting layer SrS: Cu, I, Ga film is formed so as to match the desired shape of light emission and completely cover the insulating layer aluminum / titanium oxide film. The light emitting layer has a thickness of 600 nm to 2 μm and a doping concentration:
Copper, 0.05 to 5 mol%; iodine, 0.05 to 5 mol%; gallium, 0.5 to 10 mol% are formed by sputtering from an SrS target prepared. During lamination, this substrate temperature is maintained at a temperature of 75-500 ° C. These luminescent films are then 550
Anneal in nitrogen at a temperature of ~ 850 ° C. Next, a second insulating layer is formed so as to match the shape to be emitted and to completely cover the light emitting layer. This insulating layer is barium tantalate (BTO) and has a thickness of 300 nm. Next, metal Al or the like is vapor-deposited on the entire surface of the substrate where the EL element is present to form a mirror-like metal electrode to form an inorganic EL element. The performance of the obtained inorganic EL device is 60 Hz (L40 @ 60 at an alternating voltage of 114 V and a threshold value of 40 V).
The luminance measured by driving at 0.1 Hz is 14.1 cd / m ² , the luminous efficiency is 0.119 lm / W, and the chromaticity coordinate (0.1
6, 0.24), and the standardized luminous efficiency is 0.496. However, the data may be slightly different depending on the degree of cleaning of the substrate, the mixing of impurities, and the like. Specular metal electrode is Ag
(Silver) may be used. As a result, the mirror-like film can be seen through the transparent substrate from a portion other than the light emitting region from the front side of the substrate. A typical example of the EL illumination built-in mirror produced by the above method is (FIG. 2). However, the power source is AC. Inorganic EL
Regarding the emission color of the device, white, red, green, blue, etc. have been developed, and other known inorganic EL light-emitting substances,
There is an insulating layer. Appropriate inorganic E
You may produce an L element. (FIG. 13) shows an example of a fluorescent substance for an inorganic EL element. In the inorganic EL lighting built-in mirror, the light emitting element portion is changed from the laminated structure of the organic thin film to the laminated structure of the inorganic thin film, and there is no great change from the structure of the embodiment (i). However, the power source is usually alternating current. The same applies to other examples, and if the chemical substances and the stacking order necessary for obtaining the inorganic EL device as shown in the example (viii) are used, they are shown in the examples (i) to (vii). Such as substrate, electrode, light emitting device, insulating layer, mirror film,
Inorganic EL having the same positional relationship as the protective layer, etc.
It is possible to form an illumination built-in mirror. However, in the inorganic EL lighting built-in mirror, the power source is usually AC.
If a high temperature process is required, the substrate is preferably glass or the like.

[0006]

This has the following effects. (B) Since the illumination and the mirror are integrated, it is convenient because there is no need to prepare additional illumination when observing an object that is dark and difficult to see. (B) In particular, the EL used for illumination has an extremely thin light emitting layer and its shape does not matter. Therefore, even if it is integrated with a mirror, it is not bulky at all, and it is easy to carry and install. (C) Unlike the incandescent bulb and the fluorescent lamp, the EL is strong against impact because it has no hollow portion. (D) Because the EL lighting is flat with respect to the mirror surface, it looks beautiful. (E) Since the EL light emitting element can freely change the light emitting shape and the light emitting color, it is easy to see because it can emit various patterns, character shapes, and various colors.
Become a fun mirror. (F) Also, unlike fluorescent lamps, EL does not contain mercury in the element, so there is little concern that the environment will be contaminated when it is discarded. The present invention brings about these effects. The embodiments are not limited to the examples of the present specification and other specific shapes as long as they are in accordance with the idea of the invention according to the present application.

[Brief description of drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a sectional view of the present invention.

FIG. 3 is a sectional view of the present invention.

FIG. 4 is a sectional view of the present invention.

FIG. 5 is a sectional view of the present invention.

FIG. 6 is a cross-sectional view of the present invention.

FIG. 7 is a cross-sectional view of the present invention.

FIG. 8 is a sectional view of the present invention.

FIG. 9 is a structural formula of a styryl derivative DPVBi used in the present invention.

FIG. 10: Blue fluorescent dopant PA used in the present invention
It is a structural formula of VB.

FIG. 11 is a structural formula of a fluorescent compound F1 used in the present invention.

FIG. 12 is an example of a low molecular weight organic fluorescent compound.

FIG. 13 is an example of an inorganic fluorescent compound.

FIG. 14 is an example of a stacking method in which each layer does not leak in the organic EL.

FIG. 15 is an example of a stacking method in which each layer does not leak in the inorganic EL.

FIG. 16 is an example of a stacking method in which each layer does not leak in the organic EL.

FIG. 17 is an example of a stacking method in which each layer does not leak in the inorganic EL.

[Explanation of symbols]

1 transparent electrode 2 organic film laminated portion (light emitting layer, charge injection layer, charge transport layer, buffer layer, etc.) or inorganic film laminated portion (light emitting layer,
Insulating layer, etc. 3 Electrode 4 Transparent substrate 5 Insulating protective film 6 Mirror-like film 7 Protective layer 8 Light emission 9 Light emitting area 10 Mirror surface area 11 Electron injection layer 12 Electron transport layer 13 Light emitting layer 14 Hole transport layer 15 Insulating layer 16 Power supply

Claims (16)

[Claims] 1. An EL illumination built-in mirror in which an organic or inorganic EL element, which is an ultra-thin electroluminescent element, and a mirror are integrated. 2. A thin film such as at least an anode, a light emitting layer, and a cathode is laminated on a part of the back side of a transparent substrate such as glass or plastic, or in addition, a charge injection layer and a charge are appropriately provided above and below the light emitting layer. An organic EL device in which a transport layer, a buffer layer, etc. are laminated is formed, and the back side of the substrate is covered with a mirror-like cathode or a mirror-like film so that the mirror-like portion can be seen through from a portion other than the light emitting region surface from the substrate front side. Lighting built-in mirror. 3. An inorganic E in which at least an electrode, an insulating layer, a light emitting layer, etc. are laminated on a part of the back side of a transparent substrate such as glass.
An EL illumination built-in mirror in which an L element is formed and the back side of the substrate is covered with a mirror-like electrode or a mirror-like film so that the mirror-like portion can be seen through from a portion other than the light emitting region surface from the front side of the substrate. 4. A thin film such as at least an anode, a light emitting layer, and a cathode is laminated on a part of the back side of a transparent substrate such as glass or plastic, or in addition, a charge injection layer and a charge are appropriately provided above and below the light emitting layer. When forming an organic EL device in which a transport layer, a buffer layer, etc. are stacked, stack them so that the upper and lower layers of the layers do not leak (Fig. 14), cover the back side of the substrate with a mirror-like cathode, and emit light from the front side of the substrate. A mirror with built-in EL lighting that allows the mirror surface to be seen through from parts other than the area surface (Fig. 2). 5. An inorganic E in which at least an electrode, an insulating layer, a light emitting layer, etc. are laminated on a part of the back side of a transparent substrate such as glass.
When forming the L element, the upper and lower layers of the corresponding layers are stacked so as not to leak (FIG. 15), the back side of the substrate is covered with a mirror-like electrode, and the mirror surface portion is transparent from the front surface side of the substrate other than the light emitting region surface. A mirror with built-in EL lighting that was made visible (Fig. 2). 6. The organic light emitting layer according to claim 4, wherein an anode is formed on a part of the transparent substrate as a means for preventing the upper and lower layers of the layer from leaking, and the organic light emitting layer is formed so as to completely cover only the anode portion. When a charge injection layer, a charge transport layer, a buffer layer, etc. are appropriately inserted above and below the layer, the layers are sequentially formed so as to completely cover the lower layer film (FIG. 16), and the entire surface of the substrate is formed thereon. A mirror with built-in EL lighting, in which a mirror-like cathode is formed so that the mirror surface can be seen through from the front surface side of the substrate except the light emitting region surface (FIG. 3). 7. A transparent electrode is formed on a part of a transparent substrate as a means for preventing the upper and lower layers of the layer from leaking, and an inorganic light emitting layer is formed so as to completely cover only the transparent electrode part, or When appropriately inserting an insulating layer or the like above and below the inorganic light-emitting layer, the layers are sequentially formed so as to completely cover the lower layer (FIG. 17), and a mirror-like electrode is formed on the entire surface of the substrate. , A mirror with built-in EL lighting that allows the mirror surface portion to be seen through from the front side of the substrate except the light emitting area surface (FIG. 3). 8. When forming an organic EL device on a part of a transparent substrate such as glass or plastic, an anode is formed on a part of the back side of the transparent substrate and a transparent insulating film is formed on a part of the anode. When inserting a light emitting layer so as to completely cover the anode where the anode is not covered with the transparent insulating film, or if a charge injection layer, a charge transport layer, a buffer layer, etc. are appropriately inserted above and below the light emitting layer. First, the first layer is formed so as to completely cover the exposed anode, and then sequentially so as to completely cover the lower layer film, and then a mirror-like cathode is formed on the entire surface of the substrate from above, and the substrate front side is formed. A mirror with built-in EL lighting that allows the mirror surface to be seen through from the area other than the light emitting area surface (Fig. 4). 9. When forming an inorganic EL element on a part of a transparent substrate such as glass, a transparent electrode is formed on a part of the back side of the transparent substrate, and a transparent insulating film is formed on a part of the transparent electrode. ,
When inserting the light emitting layer so as to completely cover the transparent electrode in the exposed portion of the transparent electrode not covered with the transparent insulating film, or when appropriately inserting an insulating layer or the like above and below the light emitting layer, the first layer is A film is formed so as to completely cover the exposed transparent electrode and, in turn, so as to completely cover the lower layer film, and a mirror-like electrode is formed on the entire surface of the substrate from above, and the surface of the substrate other than the light emitting area surface is formed from the front side. A mirror with built-in EL lighting that allows the mirror surface to be seen through from the part (Fig. 4). 10. When forming an organic EL device on a part of a transparent substrate such as glass or plastic, an anode is formed on a part of the back side of the transparent substrate and a light emitting layer is formed on a part of the anode, or When a charge injection layer, a charge transport layer, a buffer layer, etc. are appropriately inserted above and below the light emitting layer, the layers above and below the layer are stacked so as not to leak, and the anode not covered with the organic layer is exposed. In a part, so as to completely cover the anode, but to form a transparent insulating film so as to expose a part of the uppermost part of the organic layer previously laminated, from above to form a mirror-like cathode on the entire surface of the substrate, A mirror with built-in EL lighting that allows the mirror surface to be seen through from the front side of the substrate except the light emitting area (Fig. 5). 11. An inorganic EL is formed on a part of a transparent substrate such as glass.
When forming the element, a transparent electrode is formed on a part of the back side of the transparent substrate, and a light emitting layer is formed on a part of the transparent electrode, or
Appropriately above and below the light emitting layer, when inserting an insulating layer or the like, the layers above and below the layer are laminated so as not to leak, and the transparent electrode not covered by the inorganic layer previously laminated is exposed, A transparent insulating film is formed so as to completely cover the transparent electrode, but to expose a part of the uppermost part of the inorganic layer previously laminated, and a mirror-like electrode is formed on the entire surface of the substrate from above.
A mirror with built-in EL lighting that allows the mirror surface to be seen through from the front side of the substrate except the light emitting area (Fig. 5). 12. When an organic EL element is formed on a part of a transparent substrate such as glass or plastic, it is composed of at least an anode, a light emitting layer and a cathode on a part of the back side of the transparent substrate.
Alternatively, an organic EL element in which a charge injection layer, a charge transport layer, a buffer layer, and the like are appropriately stacked above and below the light emitting layer is formed, and the periphery of the organic layer stacked with the electrode is covered with an insulating protective film, and then the substrate backside A mirror with a built-in EL lighting, in which a thin film of a material having a mirror surface such as silver or aluminum is formed so that the mirror surface can be seen through from the surface other than the light emitting region surface (FIG. 6). 13. An inorganic EL is formed on a part of a transparent substrate such as glass.
When forming an element, an inorganic EL element is formed which is composed of at least a transparent electrode, a light emitting layer, an electrode on a part of the back side of a transparent substrate, or an insulating layer or the like is appropriately laminated above and below the light emitting layer, and the electrode thereof is formed. The surrounding inorganic layer is covered with an insulating protective film, and then a thin film of a substance that becomes a mirror surface such as silver or aluminum is formed on the back side of the substrate, and the mirror surface portion is transparent from the surface side of the substrate other than the light emitting area surface. EL made visible
Built-in illumination mirror (Fig. 6). 14. When an organic EL element is formed on a part of a transparent substrate such as glass or plastic, it is composed of at least an anode, a light emitting layer and a cathode on a part of the back side of the transparent substrate.
Alternatively, an organic EL element in which a charge injection layer, a charge transport layer, a buffer layer, and the like are appropriately stacked above and below the light emitting layer is formed, and then the entire back surface of the substrate including the electrode and the stacked organic layer is covered with a transparent insulating protective film. After that, a thin film of a mirror-like material such as silver or aluminum was formed on the transparent insulating protective film, and the mirror surface portion was visible from the surface side of the substrate other than the light emitting area surface so that the mirror surface built-in mirror ( (Fig. 7). 15. An inorganic EL is formed on a part of a transparent substrate such as glass.
When forming the element, at least a part of the back side of the transparent substrate, a transparent electrode, a light emitting layer, an electrode, or, to form an inorganic EL element in which an insulating layer or the like is appropriately laminated above and below the light emitting layer, and then, The entire back surface of the substrate including the electrodes and the laminated inorganic layer is covered with a transparent insulating protective film, and then a thin film of a mirror-like substance such as silver or aluminum is formed on the transparent insulating protective film. A mirror with built-in EL lighting that allows the mirror surface to be seen through from the part (Fig. 7). 16. An EL illumination built-in mirror in which a part of an ordinary mirror is made transparent, and an organic or inorganic EL element which is an ultra-thin electroluminescent element is attached to the back surface of the transparent portion. (Figure 8)